[文本处理] 怎么样只用批处理命令就实现ANSI-UTF8的互换

@echo off
powershell -c "Get-Content 1.txt | Out-File -Encoding unicode 2.txt"
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::先輸出一個Unicode檔案
reg  export  HKCR\.txt  U.bom

::取得 Unicode BOM
chcp 1252
set /p BOM=<U.bom
set /p=%BOM:~0,2%<nul  >U.bom

::ansi → Unicode
chcp 936
copy  U.bom  Unicode.txt
cmd /u /c "type ansi.txt >>Unicode.txt"

::=======================================

chcp 65001


::Unicode → 無BOM的UTF-8
type Unicode.txt > UTF-8-0.txt


::Unicode → 有BOM的UTF-8
copy /b U.bom + Unicode.txt  Unicode-2B.txt
type Unicode-2B.txt > UTF-8-B.txt

::=======================================
::無BOM的UTF-8 → Unicode
copy  U.bom  Unicode-save-0.txt
cmd /u /c  "type  UTF-8-0.txt >> Unicode-save-0.txt"


::有BOM的UTF-8 → Unicode
cmd /u /c  "type  UTF-8-B.txt > Unicode-save-1.txt"

::========================================
::Unicode → ansi

chcp 936

type Unicode-save-0.txt > ansi-save-0.txt

type Unicode-save-1.txt > ansi-save-1.txt
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echo.//4=>U.bom
certutil -decode -f U.bom U.bom>nul
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@ECHO off&setlocal EnableDelayedExpansion
Set gbk=绿图
chcp 1252 >nul
for /f %%a in ('cmd/u/cecho !gbk!')do set un=%%a
Set head=!un:~0,1!!un:~2,1!
set/p=!head!<nul>U.bom

chcp 936
copy /b /y U.bom 转换后.txt
cmd /u /c type 转换前.txt >>转换后.txt
pause
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@ECHO off&setlocal EnableDelayedExpansion
Set gbk=绿图
chcp 437>nul
for /f %%a in ('cmd/u/cecho !gbk!')do set un=%%a
Set head=!un:~0,1!!un:~2,1!
set/p=@^

!head!<nul>$
chcp 936
findstr /v @ $>c1.txt
cmd /u /c type a.txt >>c1.txt
pause
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@echo off
:Load
if exist "%~1" goto Read
cls&echo 未指定或指定的源文件不存在。请拖拽文件入内并按下回车键，或以文件完整路径为第一个参数（%%1）重新运行本批处理。
set /p S=
call :Load "%S:"=%"
:Read
set F="%~dp1%~n1_ANSI%~x1"
if exist %F% del %F%
set I=原始文件："%~1"&set O=目标文件：%F%&set T0=#    	注意：&set T1=#    	转换过程中不会更改原始文件。&set T2=#    	输出文件中将删除所有并在末尾创建一空白行。&set T3=#    	每行开头的鸣声符（如果存在的话）将被删除。&set T4=#    	不能识别的字符将输出问号。&set W=#    	请稍等。
>nul chcp 65001
set Str=Str_%date:~3%_%time: =0%
for /f "usebackq delims=" %%i in ("%~1") do >nul set %Str%=%%i&call :Convert
start notepad.exe %F%
ping 127.1 -n 1 >nul
exit
:Convert
if not defined N >nul chcp 936&echo %I%&echo %O%&echo;&echo %T0%&echo;&echo %T1%&echo %T2%&echo %T3%&echo %T4%&echo;&<nul set /p =%W%&set N=1
for /f "tokens=1* delims=" %%j in ('set %Str%') do >>%F% echo;%%k
goto :eof
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